DANGERS OF WHALING SHIPS AMONG ICE BERGS.
The masses of ice by which the ocean is traversed assume a vast variety of shapes, but may be comprehended in two general classes. The first consists of sheets of ice, analogous to those which annually cover the the lakes and rivers of northern lands. They present a surface which is [pg 150] generally level, but here and there diversified by projections, called hummocks, which arise from the ice having been thrown up by some pressure or force to which it has been subject. Sheets of ice, which are so large that their whole extent of surface cannot be seen from the masthead of a vessel, are called fields. They have sometimes an area of more than a hundred square miles, and rise above the level of the sea from two to eight feet. When a piece of ice, though of a considerable size, can be distinguished in its extent, it is termed a floe. A number of sheets, large or small, joining each other, and stretching out in any particular direction, constitute a stream. Captain Cook found a stream extending across Behring's Straits, connecting eastern Asia with the western extremity of North America. Owing to the vast extent of some fields of ice, they would undoubtedly be conducted to a lower latitude in the Atlantic before their dissolution, under the influence of a warmer climate, but for the intervention of other causes. It frequently [pg 151] happens that two masses are propelled against each other, and are both shivered into fragments by the violence of the concussion. The ordinary swell of the ocean also acts with tremendous power upon a large tract, especially when it has been so thawed as to have become thin, and breaks it up into a thousand smaller pieces in a very short period. The danger of being entrapped between two ice-fields coming into contact with each other is one of the perils which the navigator has frequently to encounter in the northern seas; and fatal to his vessel and his life has the occurrence often been, while in a vast number of instances escape has seemed almost miraculous.
"At half-past six," says Captain Ross, relating to his first voyage of discovery, in the Isabella, to the arctic regions, with Captain Parry, in the Alexander, "the ice began to move, and, the wind increasing to a gale, the only chance left for us was to endeavor to force the ship through it to the north, where it partially opened; but the channel was so much obstructed by heavy fragments, that our utmost efforts were ineffectual; the ice closed in upon us, and at noon we felt its pressure most severely. A large floe, which lay on one side of the Isabella, appeared to be fixed; while, on the other side, another of considerable bulk was passing along with a rapid motion, assuming a somewhat circular direction, in consequence of one side having struck on the fixed field. The pressure continuing to increase, it became doubtful whether the ship would be able to sustain it; every support threatened to give way, the beams in the hold began to bend, and the iron tanks settled together.
[pg 152]
"At this critical moment, when it seemed impossible for us to bear the accumulating pressure much longer, the hull rose several feet; while the ice, which was more than six feet thick, broke against the sides, curling back on itself. The great stress now fell upon our bow; and, after being again lifted up, we were carried with great violence towards the Alexander which had hitherto been, in a great measure, defended by [pg 153] the Isabella. Every effort to avoid their getting foul of each other failed; the ice-anchors and cables broke one after another; and the sterns of the two ships came so violently into contact, as to crush to pieces a boat that could not be removed in time. The collision was tremendous, the anchors and chain-plates being broken, and nothing less than the loss of the masts expected; but at this eventful instant, by the interposition of Providence, the force of the ice seemed exhausted; the two fields suddenly receded, and we passed the Alexander with comparatively little damage. A clear channel soon after opened, and we ran into a pool, thus escaping the immediate danger; but the fall of snow being very heavy, our situation still remained doubtful, nor could we conjecture whether we were yet in a place of safety. Neither the masters, the mates, nor those men who had been all their lives in the Greenland service, had ever experienced such imminent peril; and they declared, that a common whaler must have been crushed to atoms."
[pg 154]
Captain Scoresby relates a similar narrow escape from destruction owing to the same cause. "In the year 1804," he observes, "I had an opportunity of witnessing the effects produced by the lesser masses in motion. Passing between two fields of ice newly formed, about a foot in thickness, they were observed rapidly to approach each other, and, before our ship could pass the strait, they met with a velocity of three or four miles per hour. The one overlaid the other, and presently covered many acres of surface. The ship proving an obstacle to the course of the ice, it squeezed up on both sides, shaking her in a dreadful manner, and producing a loud grinding or lengthened acute trembling noise, according as the degree of pressure was diminished or increased, until it had risen as high as the deck. After about two hours the motion ceased, and soon afterwards the two sheets of ice receded from each other nearly as rapidly as they had before advanced. The ship in this case did not receive any injury; but, had the ice only been half a foot thicker, she might have been wrecked." Other navigators have not been so fortunate; and the annual loss of whaling vessels in the polar seas is considerable, the Dutch having had as many as seventy-three sail of ships wrecked in one season. Between the years 1669 and 1778, both inclusive, or a period of one hundred and seven years, they sent to the Greenland fishery fourteen thousand one hundred and sixty-seven ships, of which five hundred and sixty-one, or about four in the hundred, were lost.
[pg 155]
Every one will remember the intense and mournful interest occasioned by the loss of the President steamer which left New York in the year 1841 to cross the Atlantic, but perished in the passage, without leaving a survivor to tell the story of her fate. It has been deemed highly probable that this vessel got entangled in the ice, and was destroyed by collision with its masses; for during that year, in the month of April, the Great Western steamer encountered a field extending upwards of a hundred miles in one direction, surrounded with an immense number of floes and bergs, and had great difficulty in effecting its passage by this floating continent in safety.
[pg 156]
Another form under which the ice appears in the ocean is that of bergs, which differ from the ice-fields in shape and origin. They are masses projecting to a great height above the surface of the water, and have the appearance of chalk or marble cliffs and mountains upon the deep. They have been seen with an elevation of two hundred feet—a circumference of two miles: and it has been shown by experiments on the buoyancy of ice floating in sea water, that the proportion above the surface is only about one-seventh of the thickness of the whole mass. During the first expedition of Ross, he found an ice berg in Baffin's Bay, at a distance of seven leagues from the land, which was measured by a party under Lieutenant Parry. Considerable difficulty was experienced in the attempt to land, as, in rowing round the berg, they found it perpendicular in every place but one. When they had ascended to the [pg 157] top, which was perfectly flat, they discovered a white bear in quiet possession of the mass, who plunged into the sea without hesitation, and effected his escape. The party found the ice berg to be four thousand one hundred and sixty-nine yards long, three thousand eight hundred and sixty-nine yards broad, and fifty-one feet high, being aground in sixty-one fathoms. Its appearance was like that of the back of the Isle of Wight, and the cliffs resembled those of the chalk range to the west of Dover. The weight of this mass was calculated to amount to one billion two hundred and ninety two millions three hundred and ninety seven thousand six hundred and seventy-three tons.
A White Bear.
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An ice berg examined by Captain Graah, on the east coast of Greenland, rose one hundred and twenty feet out of the water, had a circumference of four thousand feet at the base, and its solid contents were estimated to be upwards of nine hundred millions of cubic feet. When viewed at a distance, nothing can be more interesting than the appearance of a considerable number of these formations, exhibiting an infinite variety of shape, and requiring no stretch of imagination to convert them into a series of floating towers, castles, churches, obelisks, and pyramids, or a snowy range of Alpine heights. No pencil, an observer has remarked, has ever given any thing like the true effect of an ice berg. In a picture they are huge, uncouth masses, stuck in the sea; while their chief beauty and grandeur—their slow stately motion, the whirling of the snow about their summits, and the fearful crackling of their parts—they cannot give. The ice of the bergs is compact and solid, or of a fine green tint verging to blue; and large pieces may be frequently obtained, equal to the most beautiful crystal in transparency. It is stated by Scoresby, that with a portion of this ice, of by no means regular convexity, used as a burning lens, he has frequently burnt wood, fired gunpowder, melted lead, and lit the sailors' pipes, to their no small astonishment, the ice itself remaining in the mean while perfectly fixed and pellucid.
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